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Finding the Fourth Proportional to 351,718.40, 527,578.32 and 85,479.32

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Solution

The fourth proportional to 351,718.40, 527,578.32 and 85,479.32 is: 128,219.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,718.40 : 527,578.32 = 85,479.32 : x
  2. Step 2: Convert to fraction form
    351,718.40/527,578.32 = 85,479.32/x
  3. Step 3: Cross multiply
    351,718.40x = 527,578.32 × 85,479.32
  4. Step 4: Simplify right side
    351,718.40x = 45,097,036,040.34
  5. Step 5: Solve for x
    x = 45,097,036,040.34/351,718.40
  6. Step 6: Final answer
    x = 128,219.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.